Qathe

Hi, I have the 2011 Transit Connect wagon. Is it possible to lock it with the engine running and the a/c on low? I may have to, briefly, soon. I read in another forum about someone who couldn't get their TC to unlock again after doing so. I have physical keys rather than key fob though. Before I even try it I wanted to see if this is going to present a problem. If it does, is there a way around it?